Siemens SINUMERIK 840D sl Programming Manual page 272

Coordinate transformations (frames)
5.1 Coordinate transformation via frame variables
Possible frame variable:
● Basic frame (basic offset)
● Settable frames
● Programmable frame
Value assignments and reading the actual values
Frame variable/frame relationship
A coordinate transformation can be activated by assigning the value of a frame to a frame
variable.
Example:
Frame variable:
$P_PFRAME
Frame:
CTRANS(X,10)
Reading the actual values
The current actual values of the coordinate system can be read out via predefined variables
in the part program:
$AA_IM[axis]: Read actual value in MCS
$AA_IB[axis]: Read actual value in BCS
$AA_IBN[axis]: Read actual value in BZS
$AA_IEN[axis]: Read actual value in SZS
$AA_IW[axis]: Read actual value in WCS
272
$P_PFRAME=CTRANS(X,10)
means: current programmable frame.
means: programmable zero offset of X axis by 10 mm.
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
Job Planning